FindPrevious(short) method

Continues a ULTable.FindLast() search by moving backward through the table from the current position, looking to see if the
previous row exactly matches a value or partial set of values in the current index.

numColumns
For composite indexes, the number of columns to use in the find. For example, if you have a three column index and
you want to look up a value that matches based on the first column only, you should set the value for the first column, then
supply a value of 1.